[LotM] Question about the earth

Hello

This is a repost cause it all hot messy in the last post ​When we learn it was the ​same earth Zhou Mingrui knew I got lost, how is it the same? that point wasnt explained when I searched so I wonder if its on purpose or my research failed

Thank you

​Also do not come at me saying to read the novel please I've read only one in my life and ~1218 chapters that arent even avaible in my native language is kinda hard

But YES I do plan on reading it anyways I just wanna know the story first cause I started reading but wouldn't understand much